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Hitachi DZ-BD70 Replacement Battery 7.4V 1440mAh BZ-BP14S

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From $30.99 USD $38.99
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Fits Hitachi DZ-BD70, DZ-BD7H, DZ-BX37E, DZ-GX20 camcorders; replaces BZ-BP14S, BZ-BP14SW, DZ-BP14S, DZ-BP14SJ, DZ-BP7S, DZ-BP7SW, DZ-BP21S.
7.4V, 1440mAh pack delivers full capacity on the DZ-BD70's compact form factor without voltage sag during extended video capture.
Connector slides straight into the camera body slot; locking tab seats flush with a light push until it clicks.
We cycled this cell in a DZ-BD70 body; BMS accepted the pack on first install and discharged linearly across the gauge.
On first use, run one complete charge cycle through the camera body before sustained video work—Hitachi bodies need an internal charge handshake to display accurate battery percentage.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.4V

Amp

1440mAh

Hitachi DZ-BD70 / DZ-GX20 Series — 7.4V Li-ion Replacement Battery (BZ-BP14S)

This is a 7.4V, 1440mAh Li-ion battery for Hitachi camcorders including the DZ-BD70, DZ-BD7H, DZ-BX37E, and DZ-GX20, among 38 additional models. It replaces OEM part numbers BZ-BP14S, BZ-BP14SW, DZ-BP14S, DZ-BP14SJ, DZ-BP7S, DZ-BP7SW, and DZ-BP21s. The cell and contact arrangement match the original battery bay.

  • DZ-BD and DZ-GX platform fit: These camcorder lines share the same 7.4V nominal rail and physical connector footprint across the range. One battery form factor covers the full group because Hitachi standardised the BMS handshake protocol across this generation.
  • Bench tested on actual hardware: We cycled this cell in the DZ-BD70 body and monitored BMS communication through charge and discharge. The protection circuit responded correctly to end-of-charge and low-voltage cutoff thresholds — no false trips or rejected handshakes.
  • First-install charge protocol for the DZ-BD70: Charge this battery inside the camera body using the OEM charger on the first cycle. The DZ-BD70 BMS maps its battery-remaining display against a full charge baseline — skipping this step can cause the indicator to read inaccurately for the first several uses.

Why the DZ-BD70 displays a dead battery icon on a partially charged replacement cell

The DZ-BD70 estimates remaining capacity by mapping the cell's voltage curve against stored thresholds from the original BMS calibration. A new third-party cell has a slightly different discharge curve, so the camera's voltage-to-percentage translation can misfire early. The body may show empty at what is actually 3.4V per cell — well above the true cutoff of around 3.0V per cell. Running one full charge-discharge cycle inside the camera body lets the BMS re-anchor its reference points to the new cell's curve.

Battery percentage jumping between values mid-recording on the DZ-BD70

Erratic percentage jumps during video recording usually mean the BMS is sampling voltage under fluctuating load — the combined draw from the sensor, processor, and optical system causes momentary voltage sag that the indicator interprets as a capacity drop. The display then corrects itself when load eases, producing the jumping behaviour. This is a display mapping issue, not a cell fault. Charge to full via the OEM charger, complete one full discharge cycle, and the indicator will stabilise at 7.4V nominal.

Compatible Models

DZ-BD70 DZ-BD7H DZ-BX37E DZ-GX20 DZ-GX20A DZ-GX20E DZ-GX3200 DZ-GX3200A DZ-GX3200E DZ-GX3300(B) DZ-GX3300(S) DZ-GX3300A DZ-GX3300E DZ-GX5000A DZ-GX5020A DZ-GX5060SW DZ-GX5080A DZ-GX5100SW DZ-GX5300 DZ-HS300 DZ-HS300A DZ-HS300E DZ-HS301E DZ-HS301SW DZ-HS303A DZ-HS303E DZ-HS401 DZ-HS403 DZ-HS500A DZ-HS500SW DZ-HS501E DZ-HS503 DZ-MV350A DZ-MV380A DZ-MV730 DZ-MV730A DZ-MV730E DZ-MV750 DZ-MV750E DZ-MV750MA DZ-MV780 DZ-MV780E

Replaces Part Numbers

BZ-BP14S BZ-BP14SW DZ-BP14S DZ-BP14SJ DZ-BP7S DZ-BP7SW DZ-BP21s

Technical Specifications

Voltage7.4V
Amp Hours1440mAh
Capacity1440mAh
Rate10.66Wh
Net Weight75g /2.65 oz
Gross Weight145g /5.11 oz
Approximate Weight145g /5.11 oz
Dimension 41.44 x 36.09 x 32.84mm

Product Highlights

  • Brand: Hitachi
  • Manufacturer: CS
  • Series: Standard
  • Color: Dark Grey
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The DZ-BD70 shows "no battery" immediately after I insert this replacement — is the cell dead on arrival?

Almost certainly not a dead cell. The DZ-BD70 runs a BMS authentication check on insertion, and a new third-party cell that hasn't been charge-initialised in the camera body can fail that check on the first contact. Remove the battery, reinsert it, then place it in the OEM charger connected to the camera body and run a full charge from zero. After one complete charge cycle inside the camera, the body accepts the cell without issue.

Shot count is noticeably lower than I expected — the battery drains well before the rated capacity suggests it should.

The 1440mAh rating reflects capacity under a steady, controlled discharge load. The DZ-BD70 draws additional current from continuous autofocus, optical image stabilisation, the LCD, and the recording processor simultaneously — combined, these push real-world draw significantly beyond the spec-test baseline. Cold ambient temperatures also reduce usable capacity because Li-ion cells deliver less current below around 10°C. The cell isn't underperforming; the multi-system draw is compressing usable output. Keep the camera above 10°C where possible and allow the battery to warm to room temperature before shooting.

The DZ-BD70 drains this battery quickly when left in the camera between recording sessions — is something drawing current on standby?

The DZ-BD70 maintains a low standby draw even with the power switch off — the clock circuit and BMS polling continue to pull a small current. Over days or weeks, this trickle can discharge a Li-ion cell deep enough that the BMS trips its under-voltage lockout, making the battery appear flat. If the camcorder is unused for more than a week, remove the battery and store it separately. To recover a locked-out cell, place it in the OEM charger — most chargers will push a recovery charge at low current and restore the cell once voltage climbs above 3.0V per cell.

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